Comparison of Different NDT Methods in Diagnostics of Rocket Cryogenic Tanks Thermal Protection Coating

Accidents during spacecraft launching quite often occur in different countries. They cause considerable direct material losses and indirect losses in the form of increased premiums for the insurance of subsequent launches. One of the means to improve reliability of the rockets is the non-destructive testing of the manufactured products. This paper focuses on introduction of a new holographic subsurface radar technology as a nondestructive testing technique of dielectric materials and comparison of this technology with X-ray and ultrasonic methods.